Kentucky vehicle taxes & fees

In short

The usage tax uses book value when book value is higher

The NADA comparison is the single most common surprise at a Kentucky clerk's window, and it applies to any used vehicle, cars and motorcycles alike. The defense is documentation: a notarized bill of sale, or the Affidavit of Total Consideration filed as Form 71A100 or TC96-182, showing what was actually paid. Clerks generally accept a supported figure, and Kentucky sets no fixed percentage floor beneath book value the way some states publish one, but an unsupported number invites the NADA default. Someone moving in with a car they already own is taxed too, on the vehicle's average NADA trade-in value, with credit for documented tax already paid to a reciprocal state up to Kentucky's 6%.

Trade-in credit only counts a Kentucky-titled trade

Since a 2014 change, a trade-in reduces the taxable consideration on both new and used purchases, which is straightforward enough until the trade itself is scrutinized. Kentucky only credits a vehicle that is already titled or registered in Kentucky. Trade an $8,000 Kentucky-titled car against a $25,000 purchase and the taxable base drops to $17,000, saving $480 in usage tax. Drive in a car titled in Ohio or Tennessee, trade it at a Kentucky dealership on the same terms, and none of its value comes off - the full $25,000 is taxed. The vehicle's history, not the buyer's residence, controls whether the credit applies.

The annual property tax is the recurring bill

Every Kentucky-registered vehicle is assessed on January 1 at its NADA clean trade value and taxed as property, collected by the county clerk with the birth-month registration renewal rather than sent as a separate bill. The state's share alone is 45 cents per $100 of value, so a vehicle assessed at $15,000 owes $67.50 to the state before any local rate is applied. County, school district, city and special district rates then layer on, which is why two owners of identical vehicles in different school districts pay different totals. The Department of Revenue's Motor Vehicle Tax Rate Book lists the exact combined rate for each jurisdiction.

Twenty-one dollars to register, unless it plugs in

The flat fees are among the lowest in the country: $21 a year for a passenger vehicle, $18.50 for a motorcycle or moped, $9 for a title application. Financing adds a $22 lien filing fee for each lien recorded, and a second lien from a refinance is another $22. The clerk charges $2 to notarize on site and $25 for an optional speed title with next-business-day turnaround instead of waiting on the mail. Electrified vehicles pay far more than the registration itself: $126 a year for a fully electric car or a plug-in hybrid under KRS 138.475, indexed annually and capped at a 5% increase, and $63 for an electric motorcycle. Non-plug-in hybrids stopped paying a separate fee on January 1, 2025.

Fifteen days to transfer, and renewal in your birth month

Kentucky gives a buyer 15 days from the date the seller signs the title over, under KRS 186A.215 and 186.020 - shorter than the 30-day window most states use. The seller's signature on the assignment generally has to be notarized, which is why many transactions are signed at the clerk's counter for the $2 notary fee. Registration then renews annually on the last day of your birth month, with the clerk mailing a reminder about 45 days ahead and no standing grace period afterward. Late property tax runs on the KRS 134.810 ladder: 3% if paid within 30 days of delinquency, waived entirely if paid within the first 5 days, rising to 10% past 30 days, with 15% annual interest accruing from the delinquency date. Boats are the exception to birth-month timing - every boat registration in Kentucky expires April 30.